GULF SOUTH PIPELINE COMPANY, LP — Gas transmission and gathering — incident on 2012-05-01

Gas transmission and gathering incident in MONTPELIER, ST. HELENA County, LA. Reported cause: EQUIPMENT FAILURE. Reported consequences: 0 fatalities, 0 injuries, 12514 NATURAL GAS released, $0 reported property damage. Operator-reported incident data submitted to PHMSA, generally within 30 days. Records may be supplemented or corrected and do not represent final agency causal findings.

Report number: 20120057.

Operator ID: 31728.

Reported incident date: 5/1/2012 3:08.

Cause detail: MALFUNCTION OF CONTROL/RELIEF EQUIPMENT

Cause detail: GAS CONTROL RECEIVED A CALL FROM LOCAL POLICE DEPARTMENT REPORTING A SOUND THOUGHT TO BE GAS BLOWING. GAS CONTROL NOTIFIED ON-CALL OPERATOR AND AREA MANAGER. UPON ARRIVAL, OPERATOR IDENTIFIED A RELIEF VALVE BLOWING. OPERATOR CLOSED THE ISOLATION VALVE. AFTER INVESTIGATING, RELIEF VALVE SENSING LINE WAS FOUND TO BE THE CAUSE OF THE RELIEF VALVE ACTIVATING. THE SENSING LINE WAS REPAIRED AND TESTED FOR LEAKS. THE RELIEF VALVE WAS TESTED AND PLACED BACK IN SERVICE. REVISED TO INCLUDE ANSWER TO E.5F PER PHMSA REQUEST.

PHMSA trend classification: not significant, not serious.

PHMSA standardized cause: EQUIPMENT FAILURE — MALFUNCTION OF CONTROL/RELIEF EQUIPMENT.

PHMSA indexed costs: $12,664 reported total cost, $10,575.645 in 1984 dollars, $12,985.285 in current-year dollars.

PHMSA trend flags, standardized causes, and indexed costs are analytical fields added to operator-reported incident data. They do not represent final agency causal findings.